Cant change Blood Timer

I follow the instructions from the manual that was included with this mod, but even after following the directions, i still can't change the blood timer. I can't really describe it well, other than the file won't allow me to change it. I even tried saving over it, again and again with the same name, as the notice says, but it repeats.

I don't know why it wont allow me to change the blood time modifier, but its really annoying. help if you can